feat: openai model

lua/custom/plugins/avante.lua

@@ -7,10 +7,10 @@ return {
       provider = 'openai',
       openai = {
         endpoint = 'https://api.openai.com/v1',
-        model = 'gpt-4o-mini',
+        model = 'gpt-4o',
         timeout = 30000, -- timeout in milliseconds
         temperature = 0, -- adjust if needed
-        max_tokens = 4096,
+        max_tokens = 8192,
         -- reasoning_effort = "high" -- only supported for reasoning models (o1, etc.)
       },
     },